Table of contents

0. Review of College Algebra4h 43m
1. Measuring Angles40m
2. Trigonometric Functions on Right Triangles2h 5m
3. Unit Circle1h 19m
4. Graphing Trigonometric Functions1h 19m
5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
6. Trigonometric Identities and More Equations2h 34m
7. Non-Right Triangles1h 38m
8. Vectors2h 25m
9. Polar Equations2h 5m
10. Parametric Equations1h 6m
11. Graphing Complex Numbers1h 7m

1. Measuring Angles

Complementary and Supplementary Angles

Trigonometry

1. Measuring Angles

Complementary and Supplementary Angles

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Problem 3.7

Textbook Question

Convert each degree measure to radians. Leave answers as multiples of π.

175°

Verified step by step guidance

Understand that to convert degrees to radians, you use the conversion factor \( \frac{\pi}{180} \).

Multiply the given degree measure by the conversion factor: \( 175^\circ \times \frac{\pi}{180} \).

Simplify the expression by multiplying the numbers: \( 175 \times \frac{\pi}{180} \).

Factor out any common factors from the numerator and the denominator to simplify the fraction.

Express the simplified fraction as a multiple of \( \pi \).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Degree to Radian Conversion

To convert degrees to radians, use the conversion factor π radians = 180 degrees. This means that to convert a degree measure, you multiply the degree value by π and then divide by 180. For example, to convert 175°, you would calculate (175 × π) / 180.

Simplifying Fractions

When converting degrees to radians, the resulting fraction can often be simplified. This involves finding the greatest common divisor (GCD) of the numerator and denominator and dividing both by this value. Simplifying helps express the angle in its simplest form, making it easier to understand and use in further calculations.

Understanding π in Trigonometry

In trigonometry, π (pi) is a fundamental constant representing the ratio of a circle's circumference to its diameter. It is approximately equal to 3.14, but in trigonometric contexts, it is often left in terms of π to maintain exactness. Understanding how π relates to angles is crucial for working with radians, as it helps in visualizing and calculating circular motion and periodic functions.